The French-Iraq War
Also from Strategypage, a story on France's plan to join Operation Iraqi Freedom in 2002.
France would send 18,000 troops (about what they contributed in 1991) to join the Iraq invasion force. However, France wanted a specific area of occupation after the war, with full authority in that area for as long as Iraq needed to be occupied. The American State Department backed the French proposal, but the Department of Defense didn’t trust the French, and were suspicious of their motives. So the French officer went home empty handed, and the French government decided that invading Iraq was really an evil thing to do.
What exactly were the French up to? No one is sure, but the most plausible theory was that the French wanted to be in Iraq, after Saddam fell, to make sure no embarrassing documents, or witnesses, showed up. France had been supplying Saddam with weapons, and other assistance, for over three decades.
Anyone who doesn't understand why France, Germany, and Russia criticised the War, must have their head in the sand.